angular 监听一个动态表单中变量值的变化

1. 定义表单

       this.infoForm = this.fb.group({
         type: ["TP_MERCHANT"],})

2. 初始化时监听该数据

       this.infoForm.get('type')?.valueChanges.subscribe(value => {
       console.log('cahnges',value);
       });